FAST ROOT GUIDE for Linux users (and probably others)

I found this method to be quicker, and it let me use my own installed ROM to gain root with. It is aimed at those that have rooted phones before. It also allowed me to backup my virgin, original rom. That way, I could restore -- if I munched up in my root attempts.

Note: this should work equally well with Odin, but I have no way to test that, and -- I have no way of knowing if there is an Odin version new enough to do this. Likely, though, as I've seen references to Odin in other places.

Boom! You now have a recovery! At this point, reboot into recovery.
Power off the phone, but this time hold down Volume Up+Home Key+Power
key. You'll end up at CWM.

Make a backup like you would of any other ROM.

NOTE: If you've been using your phone for a while, I *STRONGLY* suggest you backup to external SD. Each app you have installed, enlarges the side of the backup, and therefore, takes more internal SD card space!

Either way, when done, you should try to get that backup onto your computer for safe keeping.